#@tool
#@icon(icon_path: String)
class_name RhythmManager
extends Node2D
## Documentation comments

## signal
## enum
## const

@export var tempo: int = 120
@export var beats_per_measure: int = 4

var beats_elapsed: int = 0
var beat_time_start: float = 0.0
var beat_time_elapsed: float = 0.0
var seconds_per_beat: float
var useconds_per_beat: float
var song_time_elapsed: float = 0.0
var total_time_elapsed: float = 0.0
#var fmod: float
var is_running: bool = false
var start_time: float
var end_time: float
var ready_time: float
var delay_time: float

@onready var click_track: AudioStreamPlayer2D = %ClickTrack

## OVERRIDES

func _ready() -> void:
	ready_time = Time.get_ticks_usec()
	print("Ready time: %s" % ready_time)
	#var time_to_next_mix: float = AudioServer.get_time_to_next_mix() 
	#print(time_to_next_mix)
	#var output_latency: float = AudioServer.get_output_latency()
	#print(output_latency)
	#var mix_rate: float = AudioServer.get_mix_rate()
	#print(mix_rate)
	#delay_time = time_to_next_mix + output_latency
	#print(delay_time)
	seconds_per_beat = 60.0/float(tempo)
	useconds_per_beat = seconds_per_beat * 1000000.0
	#print(useconds_per_beat)

func _process(_delta: float) -> void:
	total_time_elapsed = Time.get_ticks_usec()
	#print("total time: %s" % total_time_elapsed)
	if is_running:
		song_time_elapsed = total_time_elapsed - start_time
		#print("song time elapsed: %s" % song_time_elapsed)
		beat_time_elapsed = song_time_elapsed - beat_time_start
		#print("beat time elapsed: %s" % beat_time_elapsed)
		#fmod = fmod(total_time_elapsed, useconds_per_beat)
		#print(fmod)
		if beat_time_elapsed >= useconds_per_beat:
			beats_elapsed += 1
			print("that's beat %s in the books" % beats_elapsed)
			beat_time_elapsed = 0.0
			beat_time_start = song_time_elapsed

func _input(event: InputEvent) -> void:
	if event.is_action_pressed("ui_accept"):
		if is_running == false:
			start_time = Time.get_ticks_usec()
			print("start time: %s" % start_time)
			is_running = true
			click_track.play()
		else:
			click_track.stop()
			is_running = false
			end_time = Time.get_ticks_usec()
			print("end_time: %s" % end_time)

#func _physics_process(delta: float) -> void:
	#pass

## CORE

## PRIVATE/HELPER

## RECEIVERS

## SETTERS/GETTERS